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ACUS03 KWNS 250730
SWODY3
SPC AC 250729

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0229 AM CDT Thu Jul 25 2019

Valid 271200Z - 281200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF
THE NORTHERN AND CENTRAL PLAINS...

...SUMMARY...
Isolated to widely scattered severe thunderstorms will be possible
Saturday across portions of the central and northern Plains.

...Synopsis...
An upper-level trough within a zone of stronger westerlies will move
east across Ontario Province Saturday with weak height rises
developing across the upper Midwest/Great Lakes region.  An upstream
trough over British Columbia will induce modest height falls across
MT late Saturday.  Generally weak mid/upper-level flow is expected
elsewhere across the CONUS as high pressure aloft remains centered
over the southwest U.S..

...Central/Northern Plains...
Thunderstorms should initiate over the higher terrain of northeast
WY during the afternoon aided by upslope flow and ascent with a weak
impulse rotating around the upper high.  Under generally
west/northwest flow aloft, storms should move east in the vicinity
of a residual east-west surface boundary across southern SD.  Shear
and instability will be sufficient for some severe risk, although
coverage should be initially low.  A strengthening low-level
jet/developing warm advection should help develop and sustain an
eastward moving convective system overnight across SD/northern NE
with at least some continued severe potential.

..Bunting.. 07/25/2019

$$


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